| 1 | /** @file\r |
| 2 | System Management System Table Services SmmInstallConfigurationTable service\r |
| 3 | \r |
| 4 | Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r |
| 5 | This program and the accompanying materials are licensed and made available \r |
| 6 | under the terms and conditions of the BSD License which accompanies this \r |
| 7 | distribution. The full text of the license may be found at \r |
| 8 | http://opensource.org/licenses/bsd-license.php \r |
| 9 | \r |
| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
| 12 | \r |
| 13 | **/\r |
| 14 | \r |
| 15 | #include "PiSmmCore.h"\r |
| 16 | \r |
| 17 | #define CONFIG_TABLE_SIZE_INCREASED 0x10\r |
| 18 | \r |
| 19 | UINTN mSmmSystemTableAllocateSize = 0;\r |
| 20 | \r |
| 21 | /**\r |
| 22 | The SmmInstallConfigurationTable() function is used to maintain the list\r |
| 23 | of configuration tables that are stored in the System Management System\r |
| 24 | Table. The list is stored as an array of (GUID, Pointer) pairs. The list\r |
| 25 | must be allocated from pool memory with PoolType set to EfiRuntimeServicesData.\r |
| 26 | \r |
| 27 | @param SystemTable A pointer to the SMM System Table (SMST).\r |
| 28 | @param Guid A pointer to the GUID for the entry to add, update, or remove.\r |
| 29 | @param Table A pointer to the buffer of the table to add.\r |
| 30 | @param TableSize The size of the table to install.\r |
| 31 | \r |
| 32 | @retval EFI_SUCCESS The (Guid, Table) pair was added, updated, or removed.\r |
| 33 | @retval EFI_INVALID_PARAMETER Guid is not valid.\r |
| 34 | @retval EFI_NOT_FOUND An attempt was made to delete a non-existent entry.\r |
| 35 | @retval EFI_OUT_OF_RESOURCES There is not enough memory available to complete the operation.\r |
| 36 | \r |
| 37 | **/\r |
| 38 | EFI_STATUS\r |
| 39 | EFIAPI\r |
| 40 | SmmInstallConfigurationTable (\r |
| 41 | IN CONST EFI_SMM_SYSTEM_TABLE2 *SystemTable,\r |
| 42 | IN CONST EFI_GUID *Guid,\r |
| 43 | IN VOID *Table,\r |
| 44 | IN UINTN TableSize\r |
| 45 | )\r |
| 46 | {\r |
| 47 | UINTN Index;\r |
| 48 | EFI_CONFIGURATION_TABLE *ConfigurationTable;\r |
| 49 | \r |
| 50 | //\r |
| 51 | // If Guid is NULL, then this operation cannot be performed\r |
| 52 | //\r |
| 53 | if (Guid == NULL) {\r |
| 54 | return EFI_INVALID_PARAMETER;\r |
| 55 | }\r |
| 56 | \r |
| 57 | ConfigurationTable = gSmmCoreSmst.SmmConfigurationTable;\r |
| 58 | \r |
| 59 | //\r |
| 60 | // Search all the table for an entry that matches Guid\r |
| 61 | //\r |
| 62 | for (Index = 0; Index < gSmmCoreSmst.NumberOfTableEntries; Index++) {\r |
| 63 | if (CompareGuid (Guid, &(ConfigurationTable[Index].VendorGuid))) {\r |
| 64 | break;\r |
| 65 | }\r |
| 66 | }\r |
| 67 | \r |
| 68 | if (Index < gSmmCoreSmst.NumberOfTableEntries) {\r |
| 69 | //\r |
| 70 | // A match was found, so this is either a modify or a delete operation\r |
| 71 | //\r |
| 72 | if (Table != NULL) {\r |
| 73 | //\r |
| 74 | // If Table is not NULL, then this is a modify operation.\r |
| 75 | // Modify the table enty and return.\r |
| 76 | //\r |
| 77 | ConfigurationTable[Index].VendorTable = Table;\r |
| 78 | return EFI_SUCCESS;\r |
| 79 | }\r |
| 80 | \r |
| 81 | //\r |
| 82 | // A match was found and Table is NULL, so this is a delete operation.\r |
| 83 | //\r |
| 84 | gSmmCoreSmst.NumberOfTableEntries--;\r |
| 85 | \r |
| 86 | //\r |
| 87 | // Copy over deleted entry\r |
| 88 | //\r |
| 89 | CopyMem (\r |
| 90 | &(ConfigurationTable[Index]),\r |
| 91 | &(ConfigurationTable[Index + 1]),\r |
| 92 | (gSmmCoreSmst.NumberOfTableEntries - Index) * sizeof (EFI_CONFIGURATION_TABLE)\r |
| 93 | );\r |
| 94 | \r |
| 95 | } else {\r |
| 96 | //\r |
| 97 | // No matching GUIDs were found, so this is an add operation.\r |
| 98 | //\r |
| 99 | if (Table == NULL) {\r |
| 100 | //\r |
| 101 | // If Table is NULL on an add operation, then return an error.\r |
| 102 | //\r |
| 103 | return EFI_NOT_FOUND;\r |
| 104 | }\r |
| 105 | \r |
| 106 | //\r |
| 107 | // Assume that Index == gSmmCoreSmst.NumberOfTableEntries\r |
| 108 | //\r |
| 109 | if ((Index * sizeof (EFI_CONFIGURATION_TABLE)) >= mSmmSystemTableAllocateSize) {\r |
| 110 | //\r |
| 111 | // Allocate a table with one additional entry.\r |
| 112 | //\r |
| 113 | mSmmSystemTableAllocateSize += (CONFIG_TABLE_SIZE_INCREASED * sizeof (EFI_CONFIGURATION_TABLE));\r |
| 114 | ConfigurationTable = AllocatePool (mSmmSystemTableAllocateSize);\r |
| 115 | if (ConfigurationTable == NULL) {\r |
| 116 | //\r |
| 117 | // If a new table could not be allocated, then return an error.\r |
| 118 | //\r |
| 119 | return EFI_OUT_OF_RESOURCES;\r |
| 120 | }\r |
| 121 | \r |
| 122 | if (gSmmCoreSmst.SmmConfigurationTable != NULL) {\r |
| 123 | //\r |
| 124 | // Copy the old table to the new table.\r |
| 125 | //\r |
| 126 | CopyMem (\r |
| 127 | ConfigurationTable,\r |
| 128 | gSmmCoreSmst.SmmConfigurationTable,\r |
| 129 | Index * sizeof (EFI_CONFIGURATION_TABLE)\r |
| 130 | );\r |
| 131 | \r |
| 132 | //\r |
| 133 | // Free Old Table\r |
| 134 | //\r |
| 135 | FreePool (gSmmCoreSmst.SmmConfigurationTable);\r |
| 136 | }\r |
| 137 | \r |
| 138 | //\r |
| 139 | // Update System Table\r |
| 140 | //\r |
| 141 | gSmmCoreSmst.SmmConfigurationTable = ConfigurationTable;\r |
| 142 | }\r |
| 143 | \r |
| 144 | //\r |
| 145 | // Fill in the new entry\r |
| 146 | //\r |
| 147 | CopyGuid ((VOID *)&ConfigurationTable[Index].VendorGuid, Guid);\r |
| 148 | ConfigurationTable[Index].VendorTable = Table;\r |
| 149 | \r |
| 150 | //\r |
| 151 | // This is an add operation, so increment the number of table entries\r |
| 152 | //\r |
| 153 | gSmmCoreSmst.NumberOfTableEntries++;\r |
| 154 | }\r |
| 155 | \r |
| 156 | //\r |
| 157 | // CRC-32 field is ignorable for SMM System Table and should be set to zero\r |
| 158 | //\r |
| 159 | \r |
| 160 | return EFI_SUCCESS;\r |
| 161 | }\r |